Improvement in joiners  gages



UNITED STATES PATENT Orrrcn.

SIMEON H. JENNINGS, OF DEEP RIVER, AND WILBUR F. ARNOLD, OF

WINTHROP, CONNECTICUT.

IMPROVEMENT IN JOINERS GAGES.

Spccification forming part of Letters Patent No. 146,075, dated December30, 1873; application filed October 1, 1873.

To all whom "it may concern:

Be it known that we, SnvinoN H. JENNINGS, of Deep River, and WILBUR F.ARNOLD, of WVinthrop, in the county of Middlesex and State ofConnecticut, have invented a new Improvement in Joiners Gages; and we dohereby declare the following, when taken in connection withtheaccompanying drawings and the letters of reference marked thereon, to bea full, clear, and exact description of the same, and which saiddrawings constitute part of this specification, and represent, in--Figure 1, a side view; Fig. 2, an end view; and in Fig. 3, a verticalcentral section through the head.

This invention relates to an improvement in the article known as joinersgage, the object of the invention being to simplify the construction ofa perfect article; and the invention consists in forming the bar andperforation through the head perfectly round, then filling one side ofthe perforation to make it flat, or nearly so, and taking from the bar acorresponding portion of stock, so that the bar placed in theperforation will fit it in the most perfect manner.

A is the bar; B, the head, formed from any suitable material. The headis bored out 'at the desired point for the bar-opening perfectly round,as denoted in broken lines, Fig.2. The bar is made perfectly round, andof a corresponding diameter, so as to pass freely through and perfectlyfit the head. The round bar and round opening are more easily andperfectly made than other shapes. We then fit into the perforation oropening, upon one side, (preferring the bottom,) a block, a, so as tocut off a portion of the circle, as seen in Fig. 2. This block Ipreferably make from metal. One side of the bar is cut off to someextent, and, preferably, that surface of the bar is covered with a plateof metal, I). By this construction of the bar and head a more perfectfit is attained,

and at less expense than the usual constructions. In some cases, anadjustingscrew, C,

may be arranged in the head beneath the block a, to raise that block incase it should wear. As a means for securing the bar and head in therequired adjustment, I hang a lever, D, at any desired point in thehead, preferably over the flattened surface, as seen in I Fig. 3. Theend of this lever is made of cam I shape, as at d, and beneath thishead, and extending down onto the bar, an intervening substance isplaced, (preferring a metal bear- I ing, E,) for the cam, and a softerflexible or elastic material, F, beneath. When the lever is turned downinto a cavity provided for it in the head, the cam forces theintervening part or piece down hard upon the bar, creating sufficientfriction to prevent accidental movement of the head or bar. A cavity, G,is

formed at the end of the lever, beneath which the thumb-nail may beplaced to raise the lever, as denoted in Fig. 3. This relieves thepressure and allows the adjustment of the bar and head to any desiredposition.

By this construction, the surface of the head I

